WO2008125494A1 - Vorrichtung zum schutz von umrichtermodulen - Google Patents
Vorrichtung zum schutz von umrichtermodulen Download PDFInfo
- Publication number
- WO2008125494A1 WO2008125494A1 PCT/EP2008/053925 EP2008053925W WO2008125494A1 WO 2008125494 A1 WO2008125494 A1 WO 2008125494A1 EP 2008053925 W EP2008053925 W EP 2008053925W WO 2008125494 A1 WO2008125494 A1 WO 2008125494A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit
- vacuum interrupter
- submodule
- short
- power semiconductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H79/00—Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
- H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
- H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
Definitions
- the invention relates to a device with a series connection of submodules, which have a power semiconductor circuit and an energy store in parallel to the power semiconductor circuit, each submodule being assigned a short-circuit device for short-circuiting the submodule.
- turn-off power semiconductors are used to convert AC voltage to DC and vice versa.
- the voltage level ranges from a few 10 kV up to several 100 kV.
- many equipped with power semiconductor chips semi ⁇ conductor modules are connected in series semiconductors.
- Various semi ⁇ conductor modules can also be interconnected to form a power semiconductor circuit.
- power semiconductor circuits are part of a two-pole submodule, wherein the submodules are connected in series.
- the error- ⁇ -like semiconductor module or submodule is bridged.
- a short-circuit device is used. This short-circuit device must have a lifetime during the lifetime of the system Have dielectric strength in the amount of operating voltage of a semi ⁇ conductor module and hold even in operation occasionally occurring surges.
- the current carrying capacity of the short-circuit device must be designed for the maximum assumed average operating current of the submodule. This is typically 100 A to about 1000 A.
- power semiconductors are usually used in so-called press-pack design, in particular in high-voltage direct-current converters, in which an internal short-circuit of a semiconductor component leads to a low-impedance short-circuit with only low heat generation.
- the faulty semiconductor module is alloyed, so that no further protection in the form of a short-circuit device is necessary.
- an internal failure of a semiconductor module leads to the formation of an arc, which must be switched off within a short time of typically about 1 ms in order to prevent further damage and fire triggering .
- the generic device is already known from DE 103 23 220 Al. There, an inverter is described, which having for connection to a multiple phase alternating tension ⁇ voltage line is provided.
- the inverter has phase modules that have a central AC terminal and two external AC terminals. Between the central AC terminal and each external AC terminal extends a Phasenmodul- branch, each phase module branch consists of a series circuit of submodules. Each submodule has its own capacitor, which is connected in parallel with a power semiconductor circuit. IeI is switched.
- the power semiconductor circuit includes turn-off power semiconductor, which is a free-wheeling diode is ⁇ respectively in opposite directions in parallel.
- Such a converter is also referred to as a multilevel inverter.
- the power semiconductors of a semiconductor module are not connected to each other by pressure contact. Rather, it is more cost-effective bonded semiconductor modules, so that a short circuit within the semiconductor or Submo ⁇ duls can lead to the occurrence of an arc with explosive ⁇ onsgasen and the like in the wake.
- the defective submodule is short-circuited and in this way bridged in the series connection.
- the submodule is a
- Short-circuit device connected in parallel, which includes a sacrificial ⁇ element of semiconductors or a thyristor.
- the sacrificial component alloyed in case of failure, where it is destroyed.
- the thyristor is ignited in the event of a fault and carries a significant portion of the short-circuit current.
- the prior art device is expensive due to the additional power semiconductors used.
- the device comprises a short-circuit device which is a pyrotechnic-mechanical element.
- the pyrotechnic-mechanical element gezün ⁇ det, whereby the explosive device such as a switching pin explosively accelerated so that the faulty submodule is bridged.
- the object of the invention is to provide a device of the type described at the outset which is inexpensive and at the same time enables secure bridging of a faulty submodule.
- the invention solves this problem in that the short-circuiting device is a vacuum interrupter.
- a semi-conductor ⁇ as in the prior art or an air switching path but a vacuum interrupter ⁇ is not used.
- Such vacuum interrupters are manufactured in large quantities and are therefore available on the market at low cost.
- commercially available vacuum interrupters ⁇ for the low voltage have the required electrical parameters, and are also suitable due to their size as a short-circuiting device for the sub-modules of a power converter.
- Vacuum switching sections have a particularly high dielectric insulation capacity, so that the switching path between the contacts of the vacuum interrupter tube can be kept very small. This has the effect that the accelerating forces for transferring the vacuum interrupter from a disconnected position to a contact position can also be low.
- a release and Verklinkungsaku is provided for latching the vacuum interrupter in a disconnected position and to release the latch.
- the tripping and latching unit holds a movable guided moving contact of the vacuum interrupter in a disconnected position in which a flow of current through the vacuum interrupter is interrupted.
- this tripping and latching unit triggers, the vacuum interrupter is transferred to its contact position, in which it bridges the submodule.
- a closing spring is provided, which is stretched in the disconnected position of the vacuum interrupter, so that the spring force of the closing spring for transferring the vacuum interrupter is released into its Needlesstel ⁇ treatment by releasing the latch.
- the tripping and latching unit has a permanent magnet, which provides a latching force ⁇ , and a solvent, which counteracts when releasing the Verklin ⁇ effect of the holding force.
- the solvent is an electric coil.
- the electric coil is energized to close the vacuum interrupter.
- By energizing the electric coil generates a magnetic field, which is opposite to the magnetic field of the permanent magnet.
- a holding force of the Perma ⁇ mag- nets is weakened by energizing the electric coil so that due to the closing forces the vacuum interrupter is transferred into their contact position.
- the tripping and latching unit has a magnetic yoke and a movably guided armature, wherein the yoke is connected to the permanent magnet and the armature in the disconnected position closes a magnetic circuit.
- the yoke, the permanent magnet and the armature form a magnetic circuit in the latching point.
- the armature bridges an air gap ⁇ and is firmly supported on the yoke or on the permanent magnets ⁇ th. In this position, the magnetic field of the permanent magnet spreads in the advantageously from weichmag- made of magnetic material yoke and in this respect movable anchor.
- the armature is expediently connected directly or via a suitable lever mechanism with a moving contact of the vacuum interrupter. A movement of the armature is thus introduced directly into the moving contact of the vacuum interrupter.
- the electric coil is configured for weakening the magnetic force of the permanent magnet in the magnetic circuit ⁇ . If the magnetic force of the permanent magnet is weakened, the magnetic force opposing forces, which are aligned for transferring the moving contact in the contact position, stronger than the magnetic force. It thus comes to closing the vacuum ⁇ interrupter and thus to a short circuit of the submodule.
- the power semiconductor circuit is a full bridge circuit.
- Each of these turn-off power semiconductors is a freewheeling diode connected in parallel in opposite directions.
- Each sub-module is a two pole out ⁇ leads.
- At the terminals of each submodule in the case of a full bridge circuit, as already described in connection with the prior art, either the voltage dropping across the energy store, a zero voltage or the inverted energy storage voltage can be generated.
- the power semiconductor circuit is a half-bridge circuit.
- Such half-bridge circuits have only two turn-off power semiconductor on which a respective freewheeling diode is connected in parallel in opposite directions ge ⁇ again.
- a half bridge circuit as Example ⁇ as Marquardt-circuit gron- each submodule nen at the two terminals, either the falling in the energy storage of the submodule voltage or a zero voltage is generated.
- the device is a power converter, which has an AC voltage connection for connecting an AC voltage network ⁇ .
- Possible applications of such devices are in the field of so-called “Flexible AC Transmission Systems” short FACTS or in the field of high voltage direct current transmission HVDC.
- the vacuum interrupter is designed so that it can be transferred without drift from the disconnected position in a contact position upon release of the latch, in which the submodule is short-circuited.
- the vacuum interrupter is transferred from its disconnected position into the contact position essentially solely on account of the pressure difference which prevails between the interior of the vacuum interrupter and the outside atmosphere.
- a flow of current through the vacuum interrupter is enabled, whereas in the disconnected position, a flow of current through the vacuum interrupter is interrupted.
- the pressure inside the vacuum interrupter is about 10 ⁇ 6 Pa.
- a small auxiliary spring is provided through which an additional auxiliary force to close the contact he testifies ⁇ .
- a drive ⁇ unit is provided. The drive unit enables targeted switching of the vacuum interrupter.
- FIG. 2 shows a phase module branch with a series connection of submodules
- FIG. 3 shows an embodiment of a vacuum interrupter in a sectional side view
- FIG. 4 shows the vacuum interrupter according to FIG. 3 with a tripping and latching unit
- Figure 5 is an electronic control for driving the coil of the tripping and Verklinkungsaku according to Figure 4.
- Figure 6 show a further embodiment of a elekt ⁇ ronic control for the electric coil according to Figure 4.
- FIG. 1 shows an embodiment of the device 1 according to the invention, which is composed of three phase modules 2a, 2b and 2c.
- Each phase module 2a, 2b and 2c is connected to a positive DC voltage line p and to a negative gative DC voltage line n, so that each phase module 2a, 2b, 2c has two DC voltage terminals p and n.
- an AC voltage connection 3 3 2 and 3 3 are provided for each phase module 2a, 2b and 2c.
- the AC voltage terminals 3i, 3 2 and 3 3 are connected via a transformer 4 with a three-phase AC voltage network 5.
- the phase voltages Ul, U2 and U3 fall off, with line currents InI, In2 and In3 flowing.
- phase module branches 6pl, 6p2 and 6p3 extend between each of the AC voltage terminals 3i, 3 2 or 3 3 and the positive DC voltage line p. Between each AC voltage terminal 3i, 3 2 , 3 3 and the negative DC voltage line n, the phase module branches 6nl, 6n2 and 6n3 are formed.
- Each Phasenmodul- branch 6pl, 6p2, 6p3, 6nl, 6n2 and 6n3 consists of a Rei ⁇ hensciens from not shown in detail in Figure 1 submodules and an inductance, which is designated in Figure 1 with L Kr .
- each submodule T2 7 has two ge ⁇ switched in series off power semiconductors Tl and ⁇ .
- Switchable power semiconductors are, for example, so-called IGBTs, GTOs, IGCTs or the like. These are known to the skilled person as such, so that a detailed representation at this point can be omitted.
- Each turn-off power semiconductor Tl, T2 is a flywheel diode Dl, D2 connected in anti-parallel.
- a capacitor 8 is connected as an energy storage. Each capacitor 8 is charged unipolar. Two voltage states can now be generated at the connection terminals X1 and X2 of each submodule 7. If, for example, a drive signal is generated by a drive unit 9, with which the turn-off power semiconductor T2 is transferred to its passage position in which a current flow is made possible via the power semiconductor T2, the voltage zero drops at the terminals X1, X2 of the submodule 7. In this case, the turn-off power semiconductor Tl is in its blocking position in which a current flow through the turn-off power semiconductor Tl is interrupted. This prevents the discharge of the capacitor 8. However, if the turn-off power semiconductor Tl in its passage ⁇ position, the turn-off power semiconductor T2, however, transferred to its blocking position, is applied to the terminals Xl, X2 of the submodule 7, the full capacitor voltage Uc.
- the embodiment of the device according to the invention according to Figures 1 and 2 is also referred to as a so-called multi-level power converter.
- a multi-level power converter is suitable, for example, for driving electrical machines, such as motors or the like.
- a multilevel converter is also suitable for use in the field of power distribution and transmission.
- the device according to the invention is used in play ⁇ as a short coupling, which consists of two mutually interconnected DC converters, wherein the converters are each connected to an alternating voltage network.
- Such short couplings are used for energy exchange between two power distribution networks, wherein the power distribution networks, for example, a different ⁇ frequency, phase, neutral treatment or have the like.
- each sub-module 7 is a vacuum interrupter 100 is connected as Kurz practitionerrich ⁇ processing.
- the vacuum switch tube 100 shown only schematically is in its disconnected position, so that a short circuit between the connection terminals X1 and X2 of the associated submodule 7 is avoided.
- FIG. 3 shows the vacuum interrupter 100 in a sectional side view.
- the vacuum interrupter 100 has a vaku ⁇ um réelles housing, which is formed by a first metallic Ge ⁇ housing part 141, a second metallic housing part 142 and an annular ceramic insulator and a metal bellows. In said loading excluded from the components inside the vacuum interrupter 100 prevails in a ⁇ nentik of about 10 -6 Pa. In other words, a vacuum is applied inside the vacuum interrupter 100.
- the second metallic housing member 142 is penetrated by a hard ⁇ contact pin 111, carrying a fixed contact 101 at its 100 disposed inside the vacuum switch tube free end.
- the fixed contact 101 is associated with a moving contact 102 which is opposite to this in a longitudinal direction and is fixedly connected to a BewegTypebolzen 112.
- the Beweg.bolzen 112 is longitudinally movably guided with respect to the fixed contact 101, wherein the BewegCountbolzen 112, however, is vacuum-tightly connected to the metal bellows 120.
- the fixed contact pin 101 has an indicated in Figure 3 internal thread, which is used for electrical ⁇ connection of the first terminal of an associated submodule. Accordingly, the BewegCountbol ⁇ zen 112 has an internal thread for conductive attachment of the second terminal of the submodule.
- FIG. 3 shows the vacuum interrupter 100 in its disconnected position, in which the moving contact 102 is spaced from the fixed contact 101 by a contact gap 150.
- the applied vacuum on a high electrical Isolationsvermö ⁇ conditions so that even the shown small contact gap 150 is sufficient to provide the necessary dielectric strength of the vacuum interrupter 100 in the disconnected position at high voltage.
- FIG. 4 shows the vacuum interrupter 100 with their Festkon ⁇ clock pin 111 and its BewegCountbolzen 112, wherein the BewegCountbolzen 112 determines se- with an armature 310 of a tripping and Verklinkungsaku is connected 300th
- the tripping and Verklinkungsappel 300 comprises a permanent magnet 330, a soft magnetic yoke 320, which is connected with the permanent ⁇ magnets 330, said armature 310 and an electric coil 340.
- the mag- netic field generated by the permanent magnet 330 is committed, in a Material limbabrei ⁇ th, which has the lowest possible magnetic resistance.
- the armature 310 and the yoke 320 have a low magnetic resistance compared to the air.
- the armature 310 endeavors to close the air gap 335 which can be recognized between the yoke 320 or the permanent magnet 330 and the armature 310.
- the BewegCountbolzen 112 and thus the moving contact 102 is held by the force of the permanent magnet 330 in the disconnected position.
- FIG. 5 shows an electronic control 400 for the E- lektrospule 340 of Figure 4.
- the electronic control 400 includes a power supply 410, an electronically anêtba ⁇ ren closing switch 420, a terminal for triggering the closing switch 420 and an energy store 430.
- the lock switch 420 is For example, a controllable power semiconductor, such as a thyristor or IGBT. If the closing switch 420 is closed or transferred into its open position, the energy accumulator 430 discharges with a short-circuit current flowing via the electric coil 340. Due to the short-circuit current, the electromagnet coil 340 generates such a high Mag ⁇ netfeld that the armature 30 breaks away from the magnetic yoke.
- FIG 6 shows a different embodiment of the Auslö ⁇ se- and locking unit 300, wherein the trigger and latch assembly 300 comprises as shown in FIG 6 no permanent magnet. Instead, the generated to hold the moving contact bolt ⁇ necessary holding force only by the magnetic force of the coil. In normal operation, the coil is why he encourages ⁇ . For bridging the submodule 7, however, the switch 420 is transferred to its disconnected position, so that the energization of the electric coil 340 is prevented. Thus losing the Hal ⁇ tekraft so that it comes to tearing of the anchor and so ⁇ with to close the vacuum interrupter 100 due to the above-described clamping force.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Rectifiers (AREA)
- Power Conversion In General (AREA)
- Dc-Dc Converters (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/596,159 US8390968B2 (en) | 2007-04-16 | 2008-04-02 | Apparatus for protection of converter modules |
| CN200880012451XA CN101669184B (zh) | 2007-04-16 | 2008-04-02 | 用于保护变流器模块的装置 |
| EP08735682A EP2137749A1 (de) | 2007-04-16 | 2008-04-02 | Vorrichtung zum schutz von umrichtermodulen |
| JP2010503447A JP5241820B2 (ja) | 2007-04-16 | 2008-04-02 | コンバータモジュールの保護装置 |
| BRPI0810069A BRPI0810069B8 (pt) | 2007-04-16 | 2008-04-02 | Aparelho para proteção de módulos conversores |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007018344.7A DE102007018344B4 (de) | 2007-04-16 | 2007-04-16 | Vorrichtung zum Schutz von Umrichtermodulen |
| DE102007018344.7 | 2007-04-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008125494A1 true WO2008125494A1 (de) | 2008-10-23 |
Family
ID=39683466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2008/053925 Ceased WO2008125494A1 (de) | 2007-04-16 | 2008-04-02 | Vorrichtung zum schutz von umrichtermodulen |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US8390968B2 (de) |
| EP (1) | EP2137749A1 (de) |
| JP (1) | JP5241820B2 (de) |
| CN (1) | CN101669184B (de) |
| BR (1) | BRPI0810069B8 (de) |
| DE (1) | DE102007018344B4 (de) |
| RU (1) | RU2455723C2 (de) |
| WO (1) | WO2008125494A1 (de) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009080453A1 (de) * | 2007-12-21 | 2009-07-02 | Siemens Aktiengesellschaft | Vakuumschaltröhre |
| WO2010060790A1 (de) | 2008-11-26 | 2010-06-03 | Siemens Aktiengesellschaft | Vakuumschalter mit beidseitig fest verschienten anschlussklemmen |
| JP2011024392A (ja) * | 2009-07-21 | 2011-02-03 | Hitachi Ltd | 電力変換装置 |
| EP2369725A1 (de) | 2010-03-25 | 2011-09-28 | ABB Schweiz AG | Überbrückungseinheit |
| WO2011116816A1 (en) | 2010-03-23 | 2011-09-29 | Abb Technology Ag | A voltage source converter and a method for fault handling thereof |
| WO2014148100A1 (ja) * | 2013-03-18 | 2014-09-25 | 三菱電機株式会社 | 電力変換装置 |
| WO2015149870A1 (de) * | 2014-04-04 | 2015-10-08 | Siemens Aktiengesellschaft | Kommutierungsschaltung |
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| EP2543056B1 (de) * | 2010-03-04 | 2018-01-03 | Siemens Aktiengesellschaft | Schalter mit beidseitig fest verschienten anschlussklemmen |
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| US10367423B1 (en) | 2016-09-16 | 2019-07-30 | Mitsubishi Electric Corporation | Power conversion device |
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| CN102138264A (zh) * | 2008-09-05 | 2011-07-27 | 西门子公司 | 具有变流器的装置 |
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| AU2010349377B2 (en) * | 2010-03-23 | 2016-06-30 | Abb Technology Ag | A voltage source converter and a method for fault handling thereof |
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| EP2369725A1 (de) | 2010-03-25 | 2011-09-28 | ABB Schweiz AG | Überbrückungseinheit |
| KR101197066B1 (ko) | 2010-03-25 | 2012-11-06 | 에이비비 슈바이쯔 아게 | 브리징 유닛 |
| EP2614567A4 (de) * | 2010-09-09 | 2016-03-09 | Benshaw Inc | System und verfahren zur steuerung eines m2lc-systems |
| EP2940844A4 (de) * | 2012-12-27 | 2016-11-23 | Hyosung Corp | Bypassvorrichtung für einen wechselrichter |
| US9712042B2 (en) | 2012-12-27 | 2017-07-18 | Hyosung Corporation | Bypass apparatus for converter |
| WO2014148100A1 (ja) * | 2013-03-18 | 2014-09-25 | 三菱電機株式会社 | 電力変換装置 |
| US10186952B2 (en) | 2014-03-05 | 2019-01-22 | Mitsubishi Electric Corporation | Power conversion device |
| EP3745581A1 (de) | 2014-03-05 | 2020-12-02 | Mitsubishi Electric Corporation | Stromumwandlungsvorrichtung |
| WO2015149870A1 (de) * | 2014-04-04 | 2015-10-08 | Siemens Aktiengesellschaft | Kommutierungsschaltung |
| US10320308B2 (en) | 2014-04-04 | 2019-06-11 | Siemens Aktiengesellschaft | Commutating circuit |
| US10367423B1 (en) | 2016-09-16 | 2019-07-30 | Mitsubishi Electric Corporation | Power conversion device |
| US10530243B2 (en) | 2016-09-16 | 2020-01-07 | Mitsubishi Electric Corporation | Power conversion device with malfunction detection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101669184A (zh) | 2010-03-10 |
| US8390968B2 (en) | 2013-03-05 |
| EP2137749A1 (de) | 2009-12-30 |
| DE102007018344A1 (de) | 2008-10-30 |
| US20100118453A1 (en) | 2010-05-13 |
| BRPI0810069A2 (pt) | 2014-10-21 |
| BRPI0810069B8 (pt) | 2023-04-25 |
| BRPI0810069B1 (pt) | 2019-01-15 |
| JP2010524426A (ja) | 2010-07-15 |
| JP5241820B2 (ja) | 2013-07-17 |
| RU2455723C2 (ru) | 2012-07-10 |
| RU2009141976A (ru) | 2011-05-27 |
| CN101669184B (zh) | 2013-03-06 |
| DE102007018344B4 (de) | 2022-08-04 |
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